Import of WPA supplicant 0.4.8

1 files changed, 695 insertions, 0 deletions

diff --git a/contrib/wpa_supplicant/config_file.c b/contrib/wpa_supplicant/config_file.c
new file mode 100644
index 0000000..b203893
--- /dev/null
+++ b/contrib/wpa_supplicant/config_file.c
@@ -0,0 +1,695 @@
+/*
+ * WPA Supplicant / Configuration backend: text file
+ * Copyright (c) 2003-2005, Jouni Malinen <jkmaline@cc.hut.fi>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Alternatively, this software may be distributed under the terms of BSD
+ * license.
+ *
+ * See README and COPYING for more details.
+ *
+ * This file implements a configuration backend for text files. All the
+ * configuration information is stored in a text file that uses a format
+ * described in the sample configuration file, wpa_supplicant.conf.
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "common.h"
+#include "wpa.h"
+#include "wpa_supplicant.h"
+#include "config.h"
+#include "base64.h"
+
+
+static char * wpa_config_get_line(char *s, int size, FILE *stream, int *line)
+{
+	char *pos, *end, *sstart;
+
+	while (fgets(s, size, stream)) {
+		(*line)++;
+		s[size - 1] = '\0';
+		pos = s;
+
+		while (*pos == ' ' || *pos == '\t' || *pos == '\r')
+			pos++;
+		if (*pos == '#' || *pos == '\n' || *pos == '\0' ||
+		    *pos == '\r')
+			continue;
+
+		/* Remove # comments unless they are within a double quoted
+		 * string. Remove trailing white space. */
+		sstart = strchr(pos, '"');
+		if (sstart)
+			sstart = strrchr(sstart + 1, '"');
+		if (!sstart)
+			sstart = pos;
+		end = strchr(sstart, '#');
+		if (end)
+			*end-- = '\0';
+		else
+			end = pos + strlen(pos) - 1;
+		while (end > pos &&
+		       (*end == '\n' || *end == ' ' || *end == '\t' ||
+			*end == '\r')) {
+			*end-- = '\0';
+		}
+		if (*pos == '\0')
+			continue;
+
+		return pos;
+	}
+
+	return NULL;
+}
+
+
+static struct wpa_ssid * wpa_config_read_network(FILE *f, int *line, int id)
+{
+	struct wpa_ssid *ssid;
+	int errors = 0, end = 0;
+	char buf[256], *pos, *pos2;
+
+	wpa_printf(MSG_MSGDUMP, "Line: %d - start of a new network block",
+		   *line);
+	ssid = (struct wpa_ssid *) malloc(sizeof(*ssid));
+	if (ssid == NULL)
+		return NULL;
+	memset(ssid, 0, sizeof(*ssid));
+	ssid->id = id;
+
+	wpa_config_set_network_defaults(ssid);
+
+	while ((pos = wpa_config_get_line(buf, sizeof(buf), f, line))) {
+		if (strcmp(pos, "}") == 0) {
+			end = 1;
+			break;
+		}
+
+		pos2 = strchr(pos, '=');
+		if (pos2 == NULL) {
+			wpa_printf(MSG_ERROR, "Line %d: Invalid SSID line "
+				   "'%s'.", *line, pos);
+			errors++;
+			continue;
+		}
+
+		*pos2++ = '\0';
+		if (*pos2 == '"') {
+			if (strchr(pos2 + 1, '"') == NULL) {
+				wpa_printf(MSG_ERROR, "Line %d: invalid "
+					   "quotation '%s'.", *line, pos2);
+				errors++;
+				continue;
+			}
+		}
+
+		if (wpa_config_set(ssid, pos, pos2, *line) < 0)
+			errors++;
+	}
+
+	if (!end) {
+		wpa_printf(MSG_ERROR, "Line %d: network block was not "
+			   "terminated properly.", *line);
+		errors++;
+	}
+
+	if (ssid->passphrase) {
+		if (ssid->psk_set) {
+			wpa_printf(MSG_ERROR, "Line %d: both PSK and "
+				   "passphrase configured.", *line);
+			errors++;
+		}
+		wpa_config_update_psk(ssid);
+	}
+
+	if ((ssid->key_mgmt & WPA_KEY_MGMT_PSK) && !ssid->psk_set) {
+		wpa_printf(MSG_ERROR, "Line %d: WPA-PSK accepted for key "
+			   "management, but no PSK configured.", *line);
+		errors++;
+	}
+
+	if ((ssid->group_cipher & WPA_CIPHER_CCMP) &&
+	    !(ssid->pairwise_cipher & WPA_CIPHER_CCMP)) {
+		/* Group cipher cannot be stronger than the pairwise cipher. */
+		wpa_printf(MSG_DEBUG, "Line %d: removed CCMP from group cipher"
+			   " list since it was not allowed for pairwise "
+			   "cipher", *line);
+		ssid->group_cipher &= ~WPA_CIPHER_CCMP;
+	}
+
+	if (errors) {
+		free(ssid);
+		ssid = NULL;
+	}
+
+	return ssid;
+}
+
+
+static struct wpa_config_blob * wpa_config_read_blob(FILE *f, int *line,
+						     const char *name)
+{
+	struct wpa_config_blob *blob;
+	char buf[256], *pos;
+	unsigned char *encoded = NULL, *nencoded;
+	int end = 0;
+	size_t encoded_len = 0, len;
+
+	wpa_printf(MSG_MSGDUMP, "Line: %d - start of a new named blob '%s'",
+		   *line, name);
+
+	while ((pos = wpa_config_get_line(buf, sizeof(buf), f, line))) {
+		if (strcmp(pos, "}") == 0) {
+			end = 1;
+			break;
+		}
+
+		len = strlen(pos);
+		nencoded = realloc(encoded, encoded_len + len);
+		if (nencoded == NULL) {
+			wpa_printf(MSG_ERROR, "Line %d: not enough memory for "
+				   "blob", *line);
+			free(encoded);
+			return NULL;
+		}
+		encoded = nencoded;
+		memcpy(encoded + encoded_len, pos, len);
+		encoded_len += len;
+	}
+
+	if (!end) {
+		wpa_printf(MSG_ERROR, "Line %d: blob was not terminated "
+			   "properly", *line);
+		free(encoded);
+		return NULL;
+	}
+
+	blob = malloc(sizeof(*blob));
+	if (blob == NULL) {
+		free(encoded);
+		return NULL;
+	}
+	memset(blob, 0, sizeof(*blob));
+	blob->name = strdup(name);
+	blob->data = base64_decode(encoded, encoded_len, &blob->len);
+	free(encoded);
+
+	if (blob->name == NULL || blob->data == NULL) {
+		wpa_config_free_blob(blob);
+		return NULL;
+	}
+
+	return blob;
+}
+
+
+struct wpa_config * wpa_config_read(const char *name)
+{
+	FILE *f;
+	char buf[256], *pos;
+	int errors = 0, line = 0;
+	struct wpa_ssid *ssid, *tail = NULL, *head = NULL;
+	struct wpa_config *config;
+	int id = 0, prio;
+
+	config = wpa_config_alloc_empty(NULL, NULL);
+	if (config == NULL)
+		return NULL;
+	wpa_printf(MSG_DEBUG, "Reading configuration file '%s'", name);
+	f = fopen(name, "r");
+	if (f == NULL) {
+		free(config);
+		return NULL;
+	}
+
+	while ((pos = wpa_config_get_line(buf, sizeof(buf), f, &line))) {
+		if (strcmp(pos, "network={") == 0) {
+			ssid = wpa_config_read_network(f, &line, id++);
+			if (ssid == NULL) {
+				wpa_printf(MSG_ERROR, "Line %d: failed to "
+					   "parse network block.", line);
+				errors++;
+				continue;
+			}
+			if (head == NULL) {
+				head = tail = ssid;
+			} else {
+				tail->next = ssid;
+				tail = ssid;
+			}
+			if (wpa_config_add_prio_network(config, ssid)) {
+				wpa_printf(MSG_ERROR, "Line %d: failed to add "
+					   "network block to priority list.",
+					   line);
+				errors++;
+				continue;
+			}
+		} else if (strncmp(pos, "blob-base64-", 12) == 0) {
+			char *name = pos + 12, *name_end;
+			struct wpa_config_blob *blob;
+
+			name_end = strchr(name, '=');
+			if (name_end == NULL) {
+				wpa_printf(MSG_ERROR, "Line %d: no blob name "
+					   "terminator", line);
+				errors++;
+				continue;
+			}
+			*name_end = '\0';
+
+			blob = wpa_config_read_blob(f, &line, name);
+			if (blob == NULL) {
+				wpa_printf(MSG_ERROR, "Line %d: failed to read"
+					   " blob %s", line, name);
+				errors++;
+				continue;
+			}
+			wpa_config_set_blob(config, blob);
+#ifdef CONFIG_CTRL_IFACE
+		} else if (strncmp(pos, "ctrl_interface=", 15) == 0) {
+			free(config->ctrl_interface);
+			config->ctrl_interface = strdup(pos + 15);
+			wpa_printf(MSG_DEBUG, "ctrl_interface='%s'",
+				   config->ctrl_interface);
+#ifndef CONFIG_CTRL_IFACE_UDP
+		} else if (strncmp(pos, "ctrl_interface_group=", 21) == 0) {
+			struct group *grp;
+			char *endp;
+			const char *group = pos + 21;
+
+			grp = getgrnam(group);
+			if (grp) {
+				config->ctrl_interface_gid = grp->gr_gid;
+				config->ctrl_interface_gid_set = 1;
+				wpa_printf(MSG_DEBUG, "ctrl_interface_group=%d"
+					   " (from group name '%s')",
+					   (int) config->ctrl_interface_gid,
+					   group);
+				continue;
+			}
+
+			/* Group name not found - try to parse this as gid */
+			config->ctrl_interface_gid = strtol(group, &endp, 10);
+			if (*group == '\0' || *endp != '\0') {
+				wpa_printf(MSG_DEBUG, "Line %d: Invalid group "
+					   "'%s'", line, group);
+				errors++;
+				continue;
+			}
+			config->ctrl_interface_gid_set = 1;
+			wpa_printf(MSG_DEBUG, "ctrl_interface_group=%d",
+				   (int) config->ctrl_interface_gid);
+#endif /* CONFIG_CTRL_IFACE_UDP */
+#endif /* CONFIG_CTRL_IFACE */
+		} else if (strncmp(pos, "eapol_version=", 14) == 0) {
+			config->eapol_version = atoi(pos + 14);
+			if (config->eapol_version < 1 ||
+			    config->eapol_version > 2) {
+				wpa_printf(MSG_ERROR, "Line %d: Invalid EAPOL "
+					   "version (%d): '%s'.",
+					   line, config->eapol_version, pos);
+				errors++;
+				continue;
+			}
+			wpa_printf(MSG_DEBUG, "eapol_version=%d",
+				   config->eapol_version);
+		} else if (strncmp(pos, "ap_scan=", 8) == 0) {
+			config->ap_scan = atoi(pos + 8);
+			wpa_printf(MSG_DEBUG, "ap_scan=%d", config->ap_scan);
+		} else if (strncmp(pos, "fast_reauth=", 12) == 0) {
+			config->fast_reauth = atoi(pos + 12);
+			wpa_printf(MSG_DEBUG, "fast_reauth=%d",
+				   config->fast_reauth);
+		} else if (strncmp(pos, "opensc_engine_path=", 19) == 0) {
+			free(config->opensc_engine_path);
+			config->opensc_engine_path = strdup(pos + 19);
+			wpa_printf(MSG_DEBUG, "opensc_engine_path='%s'",
+				   config->opensc_engine_path);
+		} else if (strncmp(pos, "pkcs11_engine_path=", 19) == 0) {
+			free(config->pkcs11_engine_path);
+			config->pkcs11_engine_path = strdup(pos + 19);
+			wpa_printf(MSG_DEBUG, "pkcs11_engine_path='%s'",
+				   config->pkcs11_engine_path);
+		} else if (strncmp(pos, "pkcs11_module_path=", 19) == 0) {
+			free(config->pkcs11_module_path);
+			config->pkcs11_module_path = strdup(pos + 19);
+			wpa_printf(MSG_DEBUG, "pkcs11_module_path='%s'",
+				   config->pkcs11_module_path);
+		} else if (strncmp(pos, "driver_param=", 13) == 0) {
+			free(config->driver_param);
+			config->driver_param = strdup(pos + 13);
+			wpa_printf(MSG_DEBUG, "driver_param='%s'",
+				   config->driver_param);
+		} else if (strncmp(pos, "dot11RSNAConfigPMKLifetime=", 27) ==
+			   0) {
+			config->dot11RSNAConfigPMKLifetime = atoi(pos + 27);
+			wpa_printf(MSG_DEBUG, "dot11RSNAConfigPMKLifetime=%d",
+				   config->dot11RSNAConfigPMKLifetime);
+		} else if (strncmp(pos, "dot11RSNAConfigPMKReauthThreshold=",
+				   34) ==
+			   0) {
+			config->dot11RSNAConfigPMKReauthThreshold =
+				atoi(pos + 34);
+			wpa_printf(MSG_DEBUG,
+				   "dot11RSNAConfigPMKReauthThreshold=%d",
+				   config->dot11RSNAConfigPMKReauthThreshold);
+		} else if (strncmp(pos, "dot11RSNAConfigSATimeout=", 25) ==
+			   0) {
+			config->dot11RSNAConfigSATimeout = atoi(pos + 25);
+			wpa_printf(MSG_DEBUG, "dot11RSNAConfigSATimeout=%d",
+				   config->dot11RSNAConfigSATimeout);
+		} else if (strncmp(pos, "update_config=", 14) == 0) {
+			config->update_config = atoi(pos + 14);
+			wpa_printf(MSG_DEBUG, "update_config=%d",
+				   config->update_config);
+		} else {
+			wpa_printf(MSG_ERROR, "Line %d: Invalid configuration "
+				   "line '%s'.", line, pos);
+			errors++;
+			continue;
+		}
+	}
+
+	fclose(f);
+
+	config->ssid = head;
+	for (prio = 0; prio < config->num_prio; prio++) {
+		ssid = config->pssid[prio];
+		wpa_printf(MSG_DEBUG, "Priority group %d",
+			   ssid->priority);
+		while (ssid) {
+			wpa_printf(MSG_DEBUG, "   id=%d ssid='%s'",
+				   ssid->id,
+				   wpa_ssid_txt(ssid->ssid, ssid->ssid_len));
+			ssid = ssid->pnext;
+		}
+	}
+	if (errors) {
+		wpa_config_free(config);
+		config = NULL;
+		head = NULL;
+	}
+
+	return config;
+}
+
+
+static void write_str(FILE *f, const char *field, struct wpa_ssid *ssid)
+{
+	char *value = wpa_config_get(ssid, field);
+	if (value == NULL)
+		return;
+	fprintf(f, "\t%s=%s\n", field, value);
+	free(value);
+}
+
+
+static void write_int(FILE *f, const char *field, int value, int def)
+{
+	if (value == def)
+		return;
+	fprintf(f, "\t%s=%d\n", field, value);
+}
+
+
+static void write_bssid(FILE *f, struct wpa_ssid *ssid)
+{
+	char *value = wpa_config_get(ssid, "bssid");
+	if (value == NULL)
+		return;
+	fprintf(f, "\tbssid=%s\n", value);
+	free(value);
+}
+
+
+static void write_psk(FILE *f, struct wpa_ssid *ssid)
+{
+	char *value = wpa_config_get(ssid, "psk");
+	if (value == NULL)
+		return;
+	fprintf(f, "\tpsk=%s\n", value);
+	free(value);
+}
+
+
+static void write_proto(FILE *f, struct wpa_ssid *ssid)
+{
+	char *value;
+
+	if (ssid->proto == DEFAULT_PROTO)
+		return;
+
+	value = wpa_config_get(ssid, "proto");
+	if (value == NULL)
+		return;
+	if (value[0])
+		fprintf(f, "\tproto=%s\n", value);
+	free(value);
+}
+
+
+static void write_key_mgmt(FILE *f, struct wpa_ssid *ssid)
+{
+	char *value;
+
+	if (ssid->key_mgmt == DEFAULT_KEY_MGMT)
+		return;
+
+	value = wpa_config_get(ssid, "key_mgmt");
+	if (value == NULL)
+		return;
+	if (value[0])
+		fprintf(f, "\tkey_mgmt=%s\n", value);
+	free(value);
+}
+
+
+static void write_pairwise(FILE *f, struct wpa_ssid *ssid)
+{
+	char *value;
+
+	if (ssid->pairwise_cipher == DEFAULT_PAIRWISE)
+		return;
+
+	value = wpa_config_get(ssid, "pairwise");
+	if (value == NULL)
+		return;
+	if (value[0])
+		fprintf(f, "\tpairwise=%s\n", value);
+	free(value);
+}
+
+
+static void write_group(FILE *f, struct wpa_ssid *ssid)
+{
+	char *value;
+
+	if (ssid->group_cipher == DEFAULT_GROUP)
+		return;
+
+	value = wpa_config_get(ssid, "group");
+	if (value == NULL)
+		return;
+	if (value[0])
+		fprintf(f, "\tgroup=%s\n", value);
+	free(value);
+}
+
+
+static void write_auth_alg(FILE *f, struct wpa_ssid *ssid)
+{
+	char *value;
+
+	if (ssid->auth_alg == 0)
+		return;
+
+	value = wpa_config_get(ssid, "auth_alg");
+	if (value == NULL)
+		return;
+	if (value[0])
+		fprintf(f, "\tauth_alg=%s\n", value);
+	free(value);
+}
+
+
+static void write_eap(FILE *f, struct wpa_ssid *ssid)
+{
+	char *value;
+
+	value = wpa_config_get(ssid, "eap");
+	if (value == NULL)
+		return;
+
+	if (value[0])
+		fprintf(f, "\teap=%s\n", value);
+	free(value);
+}
+
+
+static void write_wep_key(FILE *f, int idx, struct wpa_ssid *ssid)
+{
+	char field[20], *value;
+
+	snprintf(field, sizeof(field), "wep_key%d", idx);
+	value = wpa_config_get(ssid, field);
+	if (value) {
+		fprintf(f, "\t%s=%s\n", field, value);
+		free(value);
+	}
+}
+
+
+static void wpa_config_write_network(FILE *f, struct wpa_ssid *ssid)
+{
+	int i;
+
+#define STR(t) write_str(f, #t, ssid)
+#define INT(t) write_int(f, #t, ssid->t, 0)
+#define INT_DEF(t, def) write_int(f, #t, ssid->t, def)
+
+	STR(ssid);
+	INT(scan_ssid);
+	write_bssid(f, ssid);
+	write_psk(f, ssid);
+	write_proto(f, ssid);
+	write_key_mgmt(f, ssid);
+	write_pairwise(f, ssid);
+	write_group(f, ssid);
+	write_auth_alg(f, ssid);
+	write_eap(f, ssid);
+	STR(identity);
+	STR(anonymous_identity);
+	STR(eappsk);
+	STR(nai);
+	STR(password);
+	STR(ca_cert);
+	STR(client_cert);
+	STR(private_key);
+	STR(private_key_passwd);
+	STR(dh_file);
+	STR(subject_match);
+	STR(altsubject_match);
+	STR(ca_cert2);
+	STR(client_cert2);
+	STR(private_key2);
+	STR(private_key2_passwd);
+	STR(dh_file2);
+	STR(subject_match2);
+	STR(altsubject_match2);
+	STR(phase1);
+	STR(phase2);
+	STR(pcsc);
+	STR(pin);
+	STR(engine_id);
+	STR(key_id);
+	INT(engine);
+	INT_DEF(eapol_flags, DEFAULT_EAPOL_FLAGS);
+	for (i = 0; i < 4; i++)
+		write_wep_key(f, i, ssid);
+	INT(wep_tx_keyidx);
+	INT(priority);
+	INT_DEF(eap_workaround, DEFAULT_EAP_WORKAROUND);
+	STR(pac_file);
+	INT(mode);
+	INT(proactive_key_caching);
+	INT(disabled);
+
+#undef STR
+#undef INT
+#undef INT_DEF
+}
+
+
+static int wpa_config_write_blob(FILE *f, struct wpa_config_blob *blob)
+{
+	unsigned char *encoded;
+
+	encoded = base64_encode(blob->data, blob->len, NULL);
+	if (encoded == NULL)
+		return -1;
+
+	fprintf(f, "\nblob-base64-%s={\n%s}\n", blob->name, encoded);
+	free(encoded);
+	return 0;
+}
+
+
+int wpa_config_write(const char *name, struct wpa_config *config)
+{
+	FILE *f;
+	struct wpa_ssid *ssid;
+	struct wpa_config_blob *blob;
+	int ret = 0;
+
+	wpa_printf(MSG_DEBUG, "Writing configuration file '%s'", name);
+
+
+	f = fopen(name, "w");
+	if (f == NULL) {
+		wpa_printf(MSG_DEBUG, "Failed to open '%s' for writing", name);
+		return -1;
+	}
+
+#ifdef CONFIG_CTRL_IFACE
+	if (config->ctrl_interface)
+		fprintf(f, "ctrl_interface=%s\n", config->ctrl_interface);
+#ifndef CONFIG_CTRL_IFACE_UDP
+	if (config->ctrl_interface_gid_set) {
+		fprintf(f, "ctrl_interface_group=%d\n",
+			(int) config->ctrl_interface_gid);
+	}
+#endif /* CONFIG_CTRL_IFACE_UDP */
+#endif /* CONFIG_CTRL_IFACE */
+	if (config->eapol_version != DEFAULT_EAPOL_VERSION)
+		fprintf(f, "eapol_version=%d\n", config->eapol_version);
+	if (config->ap_scan != DEFAULT_AP_SCAN)
+		fprintf(f, "ap_scan=%d\n", config->ap_scan);
+	if (config->fast_reauth != DEFAULT_FAST_REAUTH)
+		fprintf(f, "fast_reauth=%d\n", config->fast_reauth);
+	if (config->opensc_engine_path)
+		fprintf(f, "opensc_engine_path=%s\n",
+			config->opensc_engine_path);
+	if (config->pkcs11_engine_path)
+		fprintf(f, "pkcs11_engine_path=%s\n",
+			config->pkcs11_engine_path);
+	if (config->pkcs11_module_path)
+		fprintf(f, "pkcs11_module_path=%s\n",
+			config->pkcs11_module_path);
+	if (config->driver_param)
+		fprintf(f, "driver_param=%s\n", config->driver_param);
+	if (config->dot11RSNAConfigPMKLifetime)
+		fprintf(f, "dot11RSNAConfigPMKLifetime=%d\n",
+			config->dot11RSNAConfigPMKLifetime);
+	if (config->dot11RSNAConfigPMKReauthThreshold)
+		fprintf(f, "dot11RSNAConfigPMKReauthThreshold=%d\n",
+			config->dot11RSNAConfigPMKReauthThreshold);
+	if (config->dot11RSNAConfigSATimeout)
+		fprintf(f, "dot11RSNAConfigSATimeout=%d\n",
+			config->dot11RSNAConfigSATimeout);
+	if (config->update_config)
+		fprintf(f, "update_config=%d\n", config->update_config);
+
+	for (ssid = config->ssid; ssid; ssid = ssid->next) {
+		fprintf(f, "\nnetwork={\n");
+		wpa_config_write_network(f, ssid);
+		fprintf(f, "}\n");
+	}
+
+	for (blob = config->blobs; blob; blob = blob->next) {
+		ret = wpa_config_write_blob(f, blob);
+		if (ret)
+			break;
+	}
+
+	fclose(f);
+
+	wpa_printf(MSG_DEBUG, "Configuration file '%s' written %ssuccessfully",
+		   name, ret ? "un" : "");
+	return ret;
+}